Permanent magnet design for magnetic heat pumps using total cost minimization

•An AMR design methodology is proposed for lifetime cost minimization.•A topology optimization identifies cost-minimizing magnetic circuits.•Traditional objective functions are compared to a thermoeconomic approach. The active magnetic regenerator (AMR) is an attractive technology for efficient heat...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2017-11, Vol.442, p.87-96
Main Authors: Teyber, R., Trevizoli, P.V., Christiaanse, T.V., Govindappa, P., Niknia, I., Rowe, A.
Format: Article
Language:English
Subjects:
Cooling
Cooling rate
Cooling systems
Cost engineering
Cost optimization
Gadolinium
Genetic algorithm
Genetic algorithms
Halbach cylinder
Heat pumps
Magnetic circuit design
Magnetic refrigeration
Magnetism
Power efficiency
Topology
Topology optimization
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Summary:•An AMR design methodology is proposed for lifetime cost minimization.•A topology optimization identifies cost-minimizing magnetic circuits.•Traditional objective functions are compared to a thermoeconomic approach. The active magnetic regenerator (AMR) is an attractive technology for efficient heat pumps and cooling systems. The costs associated with a permanent magnet for near room temperature applications are a central issue which must be solved for broad market implementation. To address this problem, we present a permanent magnet topology optimization to minimize the total cost of cooling using a thermoeconomic cost-rate balance coupled with an AMR model. A genetic algorithm identifies cost-minimizing magnet topologies. For a fixed temperature span of 15K and 4.2kg of gadolinium, the optimal magnet configuration provides 3.3kW of cooling power with a second law efficiency (ηII) of 0.33 using 16.3kg of permanent magnet material.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2017.06.039